<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
if (session.getAttribute("adminname") ==null||session.getAttribute("adminname")=="")
{	
 %>  
<div style="display:none;">
<a href="backstagelogin.jsp" target="_top" id="topLink">Login</a>
</div>
<script Language="JavaScript">
alert("请登录!");
document.getElementById("topLink").click();
</script> 
<%}%>